Originally Posted by Mototech (Post 8980624)

Hey guys. Just got a new GX-5R from Nitro North. What is the proper break-in for this motor? I've been reading up on heat cycling and this seems like the "new school" way of break-in. The instructions provided with the motor say to idle the first two tanks etc. Coming from a motorcycle back ground, we always heat cycled new race motors on the dyno before races. This is my second nitro motor, the first being a Traxxas 3.3 (don't flame me it got me back into RC). They recommend heat cycling. What's the best way to get the best performance out of this motor? Sorry if this has been covered before but I searched and had no luck. Thanks for any and all help.

Originally Posted by motomatt (Post 8980906)

Hi Jason,
it looks like the guys beat me to answering your question. It happens frequently here. Not because I'm pokey, more like because every one here is willing to jump in and help. We have members from most everywhere. GO engines are even more popular in Australia than they are here stateside. Many of our Aussie friends have helped, and tutored, GO owners on this thread. We are proud to be friends with them.
It's all good here. Got questions....ask. Got gripes............voice 'em. Got good news/race results.................we wanna hear that too.

Moto

Originally Posted by bigmatt (Post 8988207)

is the front bearing for the new GX-II 5R a 7x19x6?

Originally Posted by bigmatt (Post 8988747)

I think this has been covered before. How much air can come out of the front bearing? I say none. I had one other go engine that had a front bearing air leak,would not hold a tune for crap! Replaced put engine back in water no leak tune was spot on. I know that some fuel coming out is okay.Some,not blowing all over the whole car. When I did the pressure test I can blow into the fuel line very lightly and have air bubbles like a bubble machine. Not the normal none /a few.

Originally Posted by bigmatt (Post 8988747)

I think this has been covered before. How much air can come out of the front bearing? I say none. I had one other go engine that had a front bearing air leak,would not hold a tune for crap! Replaced put engine back in water no leak tune was spot on. I know that some fuel coming out is okay.Some,not blowing all over the whole car. When I did the pressure test I can blow into the fuel line very lightly and have air bubbles like a bubble machine. Not the normal none /a few.

Originally Posted by deadmancourt (Post 8989317)

:eek:omg!....I just almost choked to death from laughing so hard:lol:...I broke in my buddies gxii p/s/r with idling half a tank the first run(always reheat to 200f and let cool to at least 75f)....then on the ground she went for 3 min runs till I got about 300ml of fuel then went to 5 min runs until I got another 300ml.....then 2 full tanks and on to the races she went:D

Originally Posted by deadmancourt (Post 8989317)

:eek:omg!....I just almost choked to death from laughing so hard:lol:...I broke in my buddies gxii p/s/r with idling half a tank the first run(always reheat to 200f and let cool to at least 75f)....then on the ground she went for 3 min runs till I got about 300ml of fuel then went to 5 min runs until I got another 300ml.....then 2 full tanks and on to the races she went:D

Originally Posted by PUDDIN (Post 8989437)

I Just break mine in till metal pinch is gone. been doing that for a wile and we have been getting 8 gallons plus with no rod change. everybody does it there way. :) but in 3.5 years I have been threw 4 maybe 5 motors in 3.5 years and I race almost every weekend.